Telephone belay



Aug. 23, 1927.

A. DEVIATKOFF TELEPHONE RELAY Filed Jan. 15. 1926 2 Sheets-Sheet l IJSINVENTOR. BY ATTORN Y Aug. 23,1927. 11,640,2 7

A. DEVIATKOFF TELEPHONE RELAY Filed Jan. 15, 1926 2' Sheets-Shet 2 IN VEN TOR.

61 BY Eli Patented Aug. 23, 1927.

UMTED ST S AEGADY DEVIATKOFF, OF SAN FRANCISCO, CALIFORNIA.

TELEPHONE RELAY.

Application filed January 13,1926. Serial No. 80,857.

This invention relates to telephone relays used in'transmitting over thetelephone or.

radio telephone, the invention having more particular reference to anovel type of telephone relay. v object the provision of an improvedtelephone relay which 1 may be more easily adjusted. For furthercomprehension of theinven tion, and of the objects and advantagesthereof, reference will be had to the following description andaccompanying drawings, and to the appended claims in which the variousnovel features of. the invention are more particularly set forth. 7

Fig. l of the drawing is a side elevational view of my improved device.

Fig. 2 is a bottom View of my improved telephone relay, certain partsbeing removed to show more clearly the working parts thereof.

Fig. 3 is a sectional view taken on the line 3-3 of Figure 2.

Fig. at is a sectional view taken on the line 4-4 of Figure 3. 1

Fig.5 isa sectional view taken on the line 55 of Figure Fig. .6 is aschematic diagram of the wiring a As here -embodied my improvedtelephone relay comprises a suitable base 10 having attached at itsloweredge byscrews a supplementary base 11 andat the, lower edge thereof asuitable standard 12,- preferably of rubber. The base 10 has a recess'13 at its upper side, supporting a bracket let provided with a threadedportion 1a to accommodate a suitable removable casing 15, having asuitable cover 48 provided with a disc 49 preferably of glass'to presenta neat appearance. Y

The upper portion of bracket 14 is provided with female threads 14?having screwed therein pole pieces 37 of an electromagnet. The polepieces are semi-circular below points 37 as clearly shown in Figure l,while above these points there are arcuate .segments as clearly. shownin Figure 5. Along the adjacent ends these pieces 37 are separated byinsulation 51. The insulation washer 52 separates three differentwindings. The lower winding 38 completely encircles the pole pieces 37,and the ends of said winding connect respectively to posts 3% and 36 Theinvention has for an 1 terminal 32.

and therefrom to terminals 34 and36. The

central winding 38 likewise completely encircles the pole pieces 37,andthe ends of said winding are connected respectively to. posts34 and32 and therefrom toterminals 3 1- ,and 32. The upper winding 38 iscomposed of two windings connected in series, and wound in oppositedirections around the arcuate portions of the pole pieces 37, as shownin Figure 5, and theends of [the wind ingare connected respectively toposts 31 and 33 and thereafter to, terminals 31 and 33. V f

The base 10 has a washer 53 fastened thereto by screws 5i, and isprovided with female threads to accommodate support 20 having a chamberat its upper end, the bot tom of said chamber housing a disc 23, whilethe chamber is filled with carbon, or coal granulus, and the upper endof the chamber is closed by a mica diaphragm 18 supported at its outeredges by the ring 19, said diaphragm having centrally attached a rod 17connected with a metallic disc beof the said rod 17 is provided with ananchor 16 extending over the ends of pole pieces 37, and havingelectrically attached a very fine flexible wire 56 the other end ofwhich is attachedto post 32 and thereafter'to.

The disc 23 in thebottom of the granulus chamber is connected to athreaded rod 22 supported by a rotatable member 25 which.

may be rotated byv meansfof knob allow ing a very minute adjustmentbypinions 27 and 28, rotatably mounted and meshing with the gears 29 and30. the gear 30 being attached to the said member 25, and said pinionsand gears are supported by plate 39.

A supporting body 57 supportsa bearing for member 25, and also a spring24 operatively connected to normally press disc 23v againstthe'granulus. The wire 58 forms an electrical connection from 57 to saiddlsc 23, and said w1re 58 connects to terror nal 35. o r i Leadscarrying the mcommg' signals to be relayed are connected respectively toter- -minals 31 and 33, having connections as before mentioned towindings 38. Across terminals 34 and 36, a battery 60, and adjustableresistance 61 are connected, said terminals as before explained havingconnections to winding 38 thereby energizing poles of thus formedelectromagnet, but of course the invention could also be operated withthe use of a permanent magnet instead. Terminals 32 and 35 are connectedto a circuit including a battery 62, and since, as before explained 32connects to 16 thereafter to the upper side of the granulus, while thelower side of the granulus is connected to 35, thus forming amicrophonic arrangement 68, this circuit will be the amplified circuitand have theincoming signals impressed therein, which may be received intelephone receivers 6th or may be again relayed. The winding 38 connectsbetween terminal 34 and 32, or in other words forms an inductance to thepole pieces 37 connected between the microphonic circuit and theelectromagnet energizing circuit. The last mentioned circuit 38 adds tothe quality of the invention, but the invention operates even if thiscircuit and winding is elimi nated.

By manually adjusting 26, thereby adjusting the pressure in the granuluschamber, the device can be very accurately set. The incoming signalsfrom terminals 31 and 83 vibrate the anchor 16 connected by rod 17 tothe granulus chamber, thereby changing the pressure between the coalgranulus, and effecting a resultant changing in the electricalresistance of said granulus, im-

- pregnating similar signals as the incoming ones into the microphoniccircuit, which of course, is a circuit carrying a current of greaterstrength than the incoming circuit current.

While I have above described the preferred form, construction andarrangen'ient of the several elements employed, it, will be understoodthat the device is, nevertheless, susceptible of considerablemodification therein, and that parts illustrated and clescribed asseparate details may be combined, and I therefore reserve the privilegeof resorting to all such changes as may be fairly embodied within thespirit and scope of the invention as claimed.

Having thus described my invention what I claim as new, and desire tosecure by Letters Patentof the United States is as follows 1. In adevice of the class described, having a microphone, and an operatingknob with a train of gears for adjusting the pressure of the microphonicsubstance of said microphone, the combination of a base, a supplementarybase attached to the bottom of said base, said train of gears beingmounted in said bases, a washer fastened to the upper side of said base,a support tliieacleclly"engaged in said washer, said support having achamber at its upper end to'house said microphone, a 'member engagingagainst said microphone, a threaded rod connected to'said member, arotatable member threadedly engaging said rod, said rotatable memberbeing connected to the last gear of said train of gears, a bodysupported in said base, said bod forming a bearing for said rotatablememl ier, and an expansion spring acting betweensa'id body and saidmember which engages against said microphone.

2. In a device of the class described,'having a microphone, and anoperating knob with a train of gears for adjusting the pressure of themicrophonic substance of said microphone, tie combination of a base, asupplementary base attached to the bottom of said base, said train ofgears being mounted in said bases, a washer fastened to the upper sideof said base, a support threadedly engaged in said washer, said supporthaving a chamber at its upper end tohouse said microphone, 'memberengaging against said microphone, a threaded rod connected to saidmember, a rotatable member threadedly engaging said rod, said rotatablemember being connected to the'last gear of said train of gears, a bodysupported in said base, saidbody-iorming a bearing for said rotatablemember, a flange depending from said body, and an expair sion springacting between said flange and said member which engages against saidmicrophone.

In testimony whereof Ihave aflixed my signature.

ARCADY DEVIATKOFF.

